[Rivet] RIVET -- how can I access all particles?

[Andy Buckley]

Hi Andrey,

You're right, that's exactly what Rivet is designed to discourage!

You _can_ obtain that information -- if it is in the event record at all
-- by accessing the raw HepMC GenEvent object with a call to
event.genEvent(). But you're then on your own, i.e. you'll have to
manually deal with problems like the lack of a standard inertial frame
and representation of parton shower recoils for those objects. "Here be
dragons", in other words ;-)

Andy


On 02/04/15 14:56, Andrey Loginov wrote:
> Dear Rivet experts, Dear Andy,
> 
>   I googled for quite a while but couldn't answer to this question:
> 
>   How can I access all particles? (not only the final-state ones)
> 
>   For instance, for ttbar production I'd want to be able to access
> information about the top quarks and W's -- is that possible? I
> understand that Rivet is designed for final-state information, but in
> case if there is a functionality like that it would be quite useful for
> some applications.
> 
> Thank you and Best Regards,
>                 Andrey Loginov   |   Yale University (Physics Department)
>                 Phone(work/CERN) |   +41 22 76 73641 (from CERN  7-36-41)
>                 Phone(cell/CERN) |   +41 76 487 2288 (from CERN 16-22-88)
>                 Fax              |   +41 22 76 68579


-- 
Dr Andy Buckley, Lecturer / Royal Society University Research Fellow
Particle Physics Expt Group, University of Glasgow